Pipe wrench



FIG. 1 is a left perspective view showing an embodiment of my new design for a pipe wrench;

FIG. 2 is a right side view showing my new design shown in FIG. 1;

FIG. 3 is a left side view showing my new design shown in FIG. 1;

FIG. 4 is a front view showing my new design shown in FIG. 1;

FIG. 5 is a rear view showing my new design shown in FIG. 1;

FIG. 6 is a top view of my design shown in FIG. 1; and,

FIG. 7 is a bottom view of my design shown in FIG. 1. 

I claim the ornamental design for a pipe wrench, as shown and described. 